Recovery of zero-valent gold from cyanide solution by a combined method of biosorption and incineration

Kwak, In Seob; Yun, Yeoung‐Sang

doi:10.1016/j.biortech.2010.06.080

Cited by 28 publications

(12 citation statements)

References 29 publications

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“…Previous reports mainly focused on the biosorption phase in the gold biorecovery process, of which the gold was also ionic after biorecovery . Alternately, an exogeneous electron donor or subsequent incineration was required to get zero‐valent gold . Here, we reported a simultaneous sorption and reduction coupled gold biorecovery process, in which the adsorbed gold ions could be reduced to form AuNPs without any exogeneous electron donor.…”

Section: Discussionmentioning

confidence: 98%

“…To date, recovery of gold through the biomass sorption based approach has been widely reported . For example, Pethkar and Paknikar achieved gold ions recovery from aqueous solution and electroplating unit effluent by using C. cladosporioides biomass beads as biosorbent .…”

Section: Introductionmentioning

confidence: 99%

“…Zhu et al reported the successful biorecovery of gold as gold nanoparticles (AuNPs) by S. haliotis with sodium lactate as electron donor . Kwak and Yun recovered zero‐valent gold from gold‐cyanide solution via a biosorption and incineration combined method . If simultaneous sorption and reduction without any exogeneous electron donor can be achieved, the gold biorecovery process would tend to be easy‐operating.…”

Section: Introductionmentioning

confidence: 99%

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Sorption–reduction coupled gold recovery process boosted by Pycnoporus sanguineus biomass: Uptake pattern and performance enhancement via biomass surface modification

Shi

Zhu

Kang

et al. 2017

Biotechnology Progress

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Biorecovery is emerging as a promising process to retrieve gold from secondary resources. The present study aimed to explore the uptake pattern of Pycnoporus sanguineus biomass for gold, identify the effective functional groups in gold recovery process, and thus further intensify the process via microbial surface modification. Results showed that P. sanguineus biomass could effectively recover gold with the formation of highly crystal AuNPs without any exogeneous electron donor. Under the conditions of various initial gold concentrations (1.0, 2.0, and 3.0 mM), biomass dosage of 2.0 g/L, solution pH value of 4.0, and incubation temperature of 30°C, the uptake equilibrium established after 4, 8, and 12 h, respectively. The uptake process could be well described by pseudo-second order kinetics model (R = 0.9988) and Langmuir isotherm model (R = 0.9958). The maximum uptake capacity of P. sanguineus reached as high as 358.69 mg/g. Further analysis indicated that amino, carboxyl and hydroxyl groups positively contributed to the uptake process. Among them, amino group significantly favored the uptake of gold during recovery process. When P. sanguineus biomass was modified by introduction of amino group, the gold uptake process was successfully intensified by shortening the uptake period and enhancing the uptake capacity. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1314-1322, 2017.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sorption–reduction coupled gold recovery process boosted by Pycnoporus sanguineus biomass: Uptake pattern and performance enhancement via biomass surface modification

Shi

Zhu

Kang

et al. 2017

Biotechnology Progress

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show abstract

“…Kwak and Yun (2010) obtained biosorption capacities for gold of 50.19 and 86.16 mg g À1 , using raw and modified Corynebacterium glutamicum biomass, respectively. Park et al (2012) obtained biosorption capacities for gold of 251.7 mg g À1 using a porous fiber.…”

Section: Parametermentioning

confidence: 99%

“…The incorrect disposal of WEEE can cause serious pollution problems, because this material contains a variety of toxic substances that can contaminate the environment and threaten human health (Hong et al, 2015;Ni et al, 2013;Tomko and McDonald, 2013). At the same time, WEEE contains valuable metals such as, gold, silver, platinum, and cobalt, which can be recovered (Bertuol et al, 2015a;Jing-Ying et al, 2012;Kwak and Yun, 2010). The development of technologies to recover metals from WEEE can therefore help in obtaining valuable products, while at the same time solving an environmental problem (Park et al, 2012;Birloaga et al, 2014;Sun et al, 2015).…”

Section: Introductionmentioning

confidence: 97%